Shoe-calk



D. S. WILLIAMS.

SHOE CALK. APPLICATION FILED APR.25, I9I9.

1,355,201, Patented Oct-12, 1920 ATTORNEY,S.-

UNITED STATES PATENT on on. 1

DAVID s. WILLIAMS, or ronrmnn, ore-neon, ASSIGNQRTO c.-w. SHOE MAN-cram TUBING COMPANY, A CORPORATION or OREGON.

SHOE-'CALK.

Specification of Letters Yatent. Patentedfoct, 1,2, 1920,

Application filed April 25, 1919. Serial No. 292,711.

To albwhom it may concern:

Be it known that 1, DAVID S. WILLIAMS,

a citizen of the United States, residing at Portland, in the county of Multnomah,$tate of Oregon, have invented certain new and useful improvements -1Il Shoe-Calks; and I formed with grooves and rings adapted tobe embedded in the leather when the calk is driven in place. Under the hard usage to which the calks are subjected in service, they frequently are forced through the soles into the shoe, or become loose and are bent to one side, or even fall out. In attempts to overcome these defects, various arrang ments have been proposed, such as riveting the calks in place, or providing threaded members into which cooperating shanks of the calks are screwed. These arrangements are at best unsatisfactory, require special forms of calks, and employ parts which must be more or less accurately machined, thus increasing the cost of manufacture and the labor of applying the calks. r

'It is an object of this invention to overcome the disadvantages of prior devices by providing an arrangement for holding in place a calk of the type having a tapering shank provided with grooves and ridges, by a simple form of clamp adapted to coopcrate with the shank of the calk to'securely retain the same in place. The clamp is of such construction that it may be easily and cheaply manufactured and applied to a shoe, and when in place the calk may be placed in operative relation therewith by the sim-.

ple operation of applying the calk to the shoe, thus eliminating extra operations and increasing the rapidity with which the calks may be applied.

The particular natureof the invention, as well as other objects and advantages thereof, will appear more clearly from a description of a preferred embodiment, as

the leather.

shown in the accompanying drawings, in

which:

Figure 1 represents a shoe with the-calks in place in'the sole;

Fig. 2 shows'one of the calks; Fig. 3 is a planview showing the clamp in place on the outer sole, the calk being show-nin section.

Fig. 4 shows the clamp; Fig. 5 1s a view in sect1on showing the clamp in place on the outer'sole of the shoe;

Fig. 6 is a similar View showing the pro-- vision of a hole to indicate where the *calk is to be inserted, and

F1g. 7 1s a sectional view showing the place.

The shoe 1O shownfin Fig. 1 is of any preferred construction and is provided with an inner sole 11 and an outersole 12 from which the calks 173 project. The calks them selves are provided with a sharply pointed portion 14: and a shank formed with grooves 15 and rings 16 of gradually decreasing'diameter, thus imparting a tapered form to the shank, the end of which is pointed as at 17 to facilitate the insertion of the call: into The clamp for holding thecalk in place comprises a fiat plate 18 which may be of soft steel, hard sheet iron, or any other The plate is preferably suitable material. square, although it maybe of any other desired shape. bent to form prongs 19 adapted to be embedded in the leather'to retain the clamp in place. tral aperture 20 of a diameter corresponding to the diameter of the intermediate portion ofthe shank of the calk.

In the operation of applying the device to the soles of shoes, a number of clamps corresponding to the number of calks which are to be used are fastened in place upon the inner face of the outer solo by hand or machinery, the prongs being embedded in the leather, asshown in Fig. 5. After the clamps are in place, or during the operation of applying them, holes are bored through the sole at the center of the aperture in each clamp, as indicated at 21 in Fig. 6. These holes will serve as guides to show The corners of the plate are relation of the parts when the calk is in r The clamp is provided withfla centhe pointsat which the calks should be applied afterthe outer sole has been attached to the inner sole with the clamps lying between the two soles. The calks are appliedby in V the calks are in place they will be held seserting the points 17 into the holes 21 and driving the 'calks' into the leather.- The rings16 near the point of the shank will pass through the aperture without engaging the plate, but as the rings of larger diameter enter the aperture, they-will tend to bendv the metal of the clamp upwardly as indii cated in Fig. 7, and even rupture it at several places around the edge of the aperture, thus forming 1n effect prongs which, owing to the reslhency of the metal, will sprung into a groove of the shank andhold the calk securely in place, resisting any tendency of the calk to be ClIlVGIl further into-the sole, aswell as to prevent it from becoming loosened. The calks maybe applied to the shoe after the outer sole is in place, as described above, or they may be applied to the. outer sole and then the latter may be attached to the inner sole, the shanks of the ca-lksbeing driven into the latter. In any case, when curely by theupwardly bent prongs of the clamp, which will also be slightly embedded in the leather of the inner sole ,'thus resisting any tendency for further bending which might allowthe calkto pass further into the 1 shoe. 7 When the calk is in place, the rings and grooves will be embedded in the leather, and. the engagement of the prongs of the clamp with one ofthe grooves of the calk will increase the security with which the calk is held in place and prevent it from working'loose under 'allconditions or" use.

' with the surrounding- The prongs 19 will prevent the clamp from moving relative to the sole of the shoe so i that all parts of the device will'be held securely'in place" I .lclaimzj'. a

1. ;A device .of the character described,

comprising ashoe calk having a shank provided with grooves and'rings adapted. to be embedded in the sole of'ashoe, and a' clamp,

consisting of a flat plate adaptedto be placed between the layers of the sole and provided. with a central aperture within which the shankof the calk may be inserted portions of the plate caught in a grooveof the shank.

2. A devicefof the character described, 1

comprising a shoe calk having a tapering shank provided with grooves and rings adapted to be embedded in the sole of the shoe, and a clamp consisting of a plate provided with prongs and adapted to be placed betweenthe layers ofthe sole and having a central aperturewithin which the shank of the calk may be inserted with the surrounding portions or" the plate bent upwardly and caught in a groove of the shank.

8. A retaining device for shoe calk having tapering: shanks provided with grooves and'rlngs, comprising a plate adapted to be inserted between the layers of the sole of a shoe and provided with an aperture through I which the shankof the calk may be driven to break the 'plateat the edge of the aper- -1ture to form non -like portions which will h n 7 v engage'a groove of the calk to-hold the same 1n place.

4. A retaining device for shoe calk having tapering'shanks provided with grooves and rings, comprising a plate adapted to be inserted between the inner and outer soles of a'shoe and provided with prongs adapted to be embedded in one of the soles, said plate having a central aperture through which theshank of a calk may be driven to break the plate and bend it inwardly at the edge of the aperture to form prong-like through which the calk may be forced to r l cause thesurrounding portion of the plate to spring over the ribs and engage the calk between two of the ribs to hold the calk in place.

o 6. A' device of'the' character described comprising a calkadapted to be embedded inthe article to which the" calk is to be applied, and provided. withisurrounding ribs,

and 'a plate having an aperture of lesser diameter than some 'ofthe ribs, whereby the" surrounding portion-of the plate springs overthe ribs as'the calk is driven into the article'and finally engages the calk between two of the ribs to hold the calk in place.

In testimony whereof I afiix my signature.

- DAVID s. wILLniMsJ 

